Malicious PDF — malware analysis report

Static analysis result for SHA-256 a444cf160a86275c…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 06:31:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 33f6af693918ac7a7faf81b3e02cccfd SHA-1: a506a919f513714427fe852aa70464e2f3b4f601 SHA-256: a444cf160a86275cd06fb075e9475b8042bbb9be074e5a261521521ca115e046
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector service, which is flagged as malicious. The primary lure appears to be related to "game hacks" or "generators", aiming to trick users into visiting the malicious URL. While no scripts were extracted, the embedded URLs and the nature of the lure strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/hack-coin-master-app-game-hack In PDF document text
    • https://lib.unitri.ac.id//repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/www-robux-com_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/pokemon-go-free-fire_GM1094591345.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51EC 25624 bytes
SHA-256: 858a276508904a4a1acea4d44cf53417948cae9b063c97a9e367d044a7e58e19
font_01_sfnt_off00008c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C42 17892 bytes
SHA-256: 9c4dada9bbcb376b19026f9d82cd29b1bcb88de2b1ea71a23b293af0df71213a

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